TM corruption

I have been using Trados 2019 version and have a TM which I have been using for years and now suddenly it is giving me error: the tag present in reparse point buffer is invalid. What does it mean and how can I salvage my TM?
Any suggestions will be helpful and appreciated.

And this is the entire message:

Error processing command line arguments: The translation memory data file engine returned an error:

unable to open database file

USAGE: SDLTradosStudio.exe [/help|/?] /arg1 val1 /arg2 val2

Task: NoAutoUpdate

Description: Starts the application without automatically checking for updates.

Usage: SDLTradosStudio.exe /noautoupdate

Arguments:

/noautoupdate Starts the application without automatically checking for updates.

Task: Open Retrofit

Description: Opens a retrofit file in the Alignment View.

Usage: SDLTradosStudio.exe /openRetrofit <retrofit>

Arguments:

/openRetrofit The full file path to the retrofit file you want to open.

Task: Open Alignment

Description: Opens an alignment in the Alignment View.

Usage: SDLTradosStudio.exe /openAlignment <alignment>

Arguments:

/openAlignment The full file path to the alignment you want to open.

Task: Create Project

Description: Starts the Create Project wizard.

Usage: SDLTradosStudio.exe /createProject [/files <file1> [<file2> <folder1> ...]] [/name <name>] [/template <template>] [/referenceProject <referenceProject>]

Arguments:

/createProject Starts the Create Project wizard.

/files The full file path of one or more documents or folders to add to the Create Project wizard.

/name The name of the Project

/template An existing template name or file path to use.

/referenceProject An existing reference project file path to use.

Task: Open Document

Description: Opens a document or a number of documents in the Editor View.

Usage: SDLTradosStudio.exe /openDocument <document1> [<document2> ...]

Arguments:

/openDocument The full file path of one or more documents to open.

Task: Open File Based TM

Description: Opens a file based TM or a number of file based TMs in the TM View.

Usage: SDLTradosStudio.exe /openFileTm <file tm1> [<file tm2> ...]

Arguments:

/openFileTm The full file path of one or more TMs to open.

Task: Open Package

Description: Opens a package in the Package View.

Usage: SDLTradosStudio.exe /openPackage <package>

Arguments:

/openPackage The full file path of the package to open.

Task: Open Project

Description: Opens a project in the Projects View.

Usage: SDLTradosStudio.exe /openProject <project>

Arguments:

/openProject The full file path of a Project to open.

Task: Open Language Cloud Task

Description: Opens a Language Cloud Task in Studio

Usage: SDLTradosStudio.exe /openLCTask <sdlproject.lctask.https://languagecloud.sdl.com/?tenant=<TenantId>&taskId=<TaskId>&projectId=<ProjectId>>

Arguments:

/openLCTask The URI of the Language Cloud Task to open

Task: Open Server Project

Description: Opens a server project in the Projects View.

Usage: SDLTradosStudio.exe /openServerProject <project URI>

Arguments:

/openServerProject The URI of a Server Project to open.